<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        //用法1
        let {age, name} = {name: "jack", age: 20};
        console.log(name, age);
        //用法2
        let width = 600;
        let height = 800;
        let depth;
        console.log(width, height);

        let size = {
            width: 200,
            height: 300,
        };
     //代码块语句不允许出现在赋值语句左侧，需加小括号变成表达式
     ({width, height} = size);
        console.log(width, height);
        //对象中不存在与变量同名的属性
        ({width, height, depth} = size);
        console.log(width, height, depth);
        //给解构的变量设置默认值
        ({width, height, depth = 400} = size);
        console.log(width, height, depth);
        //对象属性赋值给不同名变量
        //let personName, name, age;
        //({name: personName, age} = {name: "tom", age: 20});
        //console.log(personName, name, age);
        </script>
</body>
</html>